Is this the new mantra for EM investors?

"Sell deficits, buy surpluses" was a winning strategy for emerging markets in 2013, but the new mantra for investing in developing economies may be "sell commodities, buy manufacturers", says Citi.

"It is unlikely that 'deficits vs surpluses' will always govern investor behavior towards emerging markets, especially now that this theme is becoming a little less relevant due to the current account adjustment that's taken place in some of the most vulnerable countries," Citi strategists led by Guillermo Mondino wrote in a report.

Countries with current account deficits such as Brazil, India, Indonesia, Turkey and South Africa – dubbed the Fragile Five - suffered for most of last year amid concerns over the Federal Reserve scaling back monetary stimulus, while those with current account surpluses including Korea, Hungary and Israel performed well.

And Citi says weakening commodity exports will widen the current account gap further. It recently revised its 2014 current account deficit target for Indonesia to 2.8 percent of GDP from 2.5 percent.

Coal – the country's biggest mining export – for example, is declining not only in terms of volume but also value due to weak prices. During the first four months of the year, Indonesia's total coal exports totaled $7.4 billion, compared with $8.5 billion in the same period a year earlier, according to Societe Generale.

Indonesia Fin Min: Doubling debt won't work

Chatib Basri, Finance Minister of Indonesia, discusses why investors are nervous about Indonesia. He also discusses presidential candidate Prabowo's plans to double down on debt.

By contrast, India's current account position has been on the mend, largely helped by slowing gold imports. The country's current account deficit narrowed to a four-year low of $1.2 billion in the first three months of the year, compared with $4.2 billion for the prior quarter.

"The 'end of the commodities super-cycle' is by now a familiar idea, but it does seem as though its consequences have become more visible. Broad-based commodities price deflation seems well-established– and this is causing commodities-exporters to suffer more than their manufacturing counterparts," Mondino said.

Of the commodity exporters, all countries but Russia experienced negative export growth during the past three quarters, according to the bank. By contrast, of the manufacturing exporters, only Thailand suffered negative export growth.

"As a result of these trends, the current account balance of commodities exporters has been deteriorating much more markedly than in manufacturing economies. In a sense, manufacturing exporters now have some kind of competitiveness-advantage over commodities exporters," he said.

Nizam Idris, head of strategy, fixed income and currencies at Macquarie Group says it makes sense to favor commodity exporters over manufacturing exporters as commodity prices are likely to come under further pressure when the U.S. begins to hike interest rates.